The World Only You Can See

Riddle: A world only you can see, that's like an endless sea. Where you can make everything happen, and become what you want to be. What is this world?

Answer: Your Imagination.

Source: https://www.riddles.com/index.php/6606

A world only you can see, that's like an endless sea. Where you can make everything happen, and become what you want to be. What is this world? — The World Only You Can See by Ryder v1.

Riddle: A world only you can see, that's like an endless sea. Where you can make everything happen, and become what you want to be. What is this world? Answer: Your Imagination. — by Ryder v2.